/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef DFX_DWARF_SECTION_H
#define DFX_DWARF_SECTION_H

#include <cinttypes>
#include <memory>
#include <unordered_map>
#include "dwarf_define.h"
#include "dfx_errors.h"
#include "dfx_memory.h"
#include "dfx_regs.h"
#include "unwind_context.h"

namespace OHOS {
namespace HiviewDFX {
class DwarfSection {
public:
    explicit DwarfSection(std::shared_ptr<DfxMemory> memory);
    virtual ~DwarfSection() = default;

    bool LinearSearchEntry(uintptr_t pc, struct UnwindTableInfo uti, struct UnwindEntryInfo& uei);
    bool SearchEntry(uintptr_t pc, struct UnwindTableInfo uti, struct UnwindEntryInfo& uei);
    bool Step(uintptr_t pc, uintptr_t fdeAddr, std::shared_ptr<RegLocState> rs);

    const uint16_t& GetLastErrorCode() { return lastErrorData_.GetCode(); }
    const uint64_t& GetLastErrorAddr() { return lastErrorData_.GetAddr(); }

protected:
    bool GetCieOrFde(uintptr_t &addr, FrameDescEntry &fdeInfo);
    void ParseCieOrFdeHeader(uintptr_t& ptr, FrameDescEntry& fdeInfo, bool& isCieEntry);
    bool ParseFde(uintptr_t fdeAddr, uintptr_t fdePtr, FrameDescEntry &fdeInfo);
    bool FillInFde(uintptr_t ptr, FrameDescEntry &fdeInfo);
    bool ParseCie(uintptr_t cieAddr, uintptr_t ciePtr, CommonInfoEntry &cieInfo);
    bool FillInCie(uintptr_t ptr, CommonInfoEntry &cieInfo);

protected:
    std::shared_ptr<DfxMemory> memory_;
    UnwindErrorData lastErrorData_;
    uint32_t cie32Value_ = 0;
    uint64_t cie64Value_ = 0;
private:
    std::unordered_map<uintptr_t, FrameDescEntry> fdeEntries_;
    std::unordered_map<uintptr_t, CommonInfoEntry> cieEntries_;
};
} // nameapace HiviewDFX
} // nameapace OHOS
#endif